聚磷酸盐在灰漠土和砖红壤中吸附-解吸附特性研究  

Study on adsorption-desorption characteristics of polyphosphate in gray desert soil and latosol soil

作　　者：张静雯 迟海龙 吴胜彪 马林 江席亮 危常州[1] 张新疆[1] ZHANG Jing-wen;CHI Hai-long;WU Sheng-biao;MA Lin;JIANG Xi-liang;WEI Chang-zhou;ZHANG Xin-jang(College of Agriculture,Shihezi University,Shihezi Xinjiang 832003)

机构地区：[1]石河子大学农学院,新疆石河子832003

出　　处：《中国土壤与肥料》2024年第7期101-107,共7页Soil and Fertilizer Sciences in China

基　　金：石河子大学高层次人才科研启动项目(RCZK201946);企业横向课题(YTHZWYJY2020001);石河子大学大学生研究训练计划(SRP)项目(srp2022018)。

摘　　要：通过研究不同聚合度聚磷酸盐在两种不同类型土壤中的磷吸附-解吸特性,为聚磷酸磷肥肥效差异的解析和农业磷肥的应用提供理论依据。以北方灰漠土和南方砖红壤为供试土壤,以常规水溶磷肥(DAP)为对照,探究不同聚合度聚磷酸盐(APP1、APP2、APP3、KTPP)在两种土壤中磷的吸附和解吸附特性,并进一步探究不同类型土壤理化性质与土壤磷吸附-解吸附量之间的相互关系。结果表明:在酸性土壤中,各处理土壤磷吸附能力表现为APP2>APP3>KTPP>APP1>DAP,土壤中磷解吸附能力为APP1>KTPP>DAP>APP3>APP2;在灰漠土中,各处理土壤磷吸附能力表现为APP2>APP1>APP3>DAP>KTPP,土壤中磷解吸附能力为KTPP>APP1>DAP>APP3>APP2。土壤各理化性质参数中土壤黏粒、铁铝氧化物含量与土壤磷最大吸附量(Q_(m))呈正相关关系。土壤pH、有机质和碳酸钙含量与Q_(m)呈负相关关系。综上所述,较高聚合度的聚磷酸盐(KTPP)在灰漠土中磷吸附能力弱,土壤磷有效性高,而较低聚合度的聚磷酸盐(APP1)在酸性土壤中的磷吸附能力弱,能保持较好的土壤磷平衡和供磷能力。土壤pH、有机质和碳酸钙含量越高,土壤黏粒和铁铝氧化物含量越低,则土壤对磷的吸附能力越低,磷的解吸越高,土壤磷有效性越高。The phosphorus adsorption-desorption characteristics of polyphosphate with different degree of polymerization in two different types of soil were studied,which provided a theoretical basis for the analysis of fertilizer efficiency differences of polyphosphate fertilizer and the application of agricultural phosphorus fertilizer.Taking gray desert soil in the north and Latosol in the south as the test soil,and conventional water-soluble phosphate fertilizer(DAP)as the control,the adsorption and desorption characteristics of phosphorus in two kinds of soils with different degrees of polyphosphate(APP1,APP2,APP3,KTPP)were explored,and the relationship between the physical and chemical properties of different soils and the amount of phosphorus adsorption desorption was further explored.The results showed that in acid soil,the phosphorus adsorption capacity of each treatment soil was in the order of APP2>APP3>KTPP>APP1>DAP,and the phosphorus desorption capacity in soil was in the order of APP1>KTPP>DAP>APP3>APP2;In gray desert soil,the phosphorus adsorption capacity of each treatment was in the order of APP2>APP1>APP3>DAP>KTPP,and the phosphorus desorption capacity of soil was in the order of KTPP>APP1>DAP>APP3>APP2.The contents of soil clay,iron and aluminum oxides in soil physical and chemical properties parameters were positively correlated with the maximum phosphorus adsorption capacity(Q_(m)).Soil pH,organic matter and calcium carbonate content were negatively correlated with Q_(m).To sum up,higher degree of polymerization polyphosphate(KTPP)has weak phosphorus adsorption capacity in gray desert soil and high soil phosphorus availability,while lower degree of polymerization polyphosphate(APP1)has weak phosphorus adsorption capacity in acid soil and can maintain good soil phosphorus balance and supply capacity.The higher the soil pH,organic matter and calcium carbonate content,the lower the soil clay and iron aluminum oxide content,the lower the soil phosphorus adsorption capacity,the higher the phosphorus desorpti

关 键 词：聚磷酸铵 吸附 解吸附 

分 类 号：X53[环境科学与工程—环境工程]